Substituted Poly phenylene vinylene s

Poly[2,5-dialkoxy-l,4-phenylene) vinylene]s with long solubilizing alkoxy chains dissolve in conventional organic solvents such as chloroform, toluene, or tetrahydrofuran [27, 28, 32-36], Their emission and absorption spectra are red-shifted relative to PPV itself, and the polymers fluorescence and electroliunines-cence quantum yields are greater than parent PPV. This benefit may be a consequence of the long alkyl chains isolating the polymer chains from each other. 

1 Polyiarylene vinylene)s - Synthesis and Applications in Semiconductor Devices 

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Chen et al. synthesized another type of PPV, dialkoxy-substituted poly[phenylene vinylene]s (dROPPV 1/1, 0.2/1, and 0/1), consisting of two repeating units with different side chain lengths (methoxy and 3,7-dimethyloctyloxy) (see Fig. 1.36) [41]. 

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